2 oz. | 4 oz. Sold Individually Custom blend of nutrients that has been proven to help nourish air plants. DIRECTIONS FOR USE: Shake well before use. Spray a light misting on airplants between waterings every 2-3 weeks or as needed. ABOUT OUR FERTILIZER SPRAY: Roots’ blend of airplant fertilizer is derived from natural sources and gives the best amount of nutrients to your airplants to keep them living a long and healthy life inside the home.